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THE SURE THING, CAN DO, CAN'T MISS SYSTEM The fifteen-cent-a-minute long distance phone call from my wife to my sister-in-law was an hour and a half long. I peered over my newspaper to the clock over Mabel's shoulder. The phone receiver blocked my view. I craned my neck. I stopped my eavesdropping, put down my paper and took out a calculator from the drawer. Mabel looked up at me and squinted.…